Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax	23.70%	24.90%	23.40%	24.10%
Deferred tax assets, net	$ 120.8		$ 120.8		$ 170.1
Gross unrecognized tax benefits	45.1		45.1		40.3
Accrued interest and penalties on unrecognized tax benefits	7.0		7.0		$ 6.5
Possible decrease in unrecognized tax benefits	$ 24.2		$ 24.2